Conic Sections

Parabola

Equation y^2 = 4ax y^2 = -4ax x^2 = 4ay x^2 = -4ay
Coordinates of Focus (a, 0) (-a, 0) (0, a) (0, -a)
Coordinates of Vertex (0, 0) (0, 0) (0, 0) (0, 0)
Equation of Axis of Symmetry y = 0 i.e. X Axis y = 0 i.e. X Axis x = 0 i.e. Y Axis x = 0 i.e. Y Axis
Length of Latus Rectum 4a 4a 4a 4a
Equation of Directrix x = -a x = a y = -a y = a

Ellipse

Equation \frac{x^2}{a^2} + \frac{y^2}{b^2} = 1
a>b
\frac{x^2}{b^2} + \frac{y^2}{a^2} = 1
a>b
Coordinates of Focus (\pm c, 0) (0, \pm c)
Coordinates of Vertex (\pm a, 0) (0, \pm a)
Relation between a, b and c a^2 = b^2 + c^2 a^2 = b^2 + c^2
Equation of Major Axis y = 0 i.e. X Axis x = 0 i.e. Y Axis
Length of Major Axis 2a 2a
Equation of Minor Axis x = 0 i.e. Y Axis y = 0 i.e. X Axis
Length of Minor Axis 2b 2b
Length of Latus Rectum \frac{2b^2}{a} \frac{2b^2}{a}
Equation of Directrix x = \pm \frac{a}{e} y = \pm \frac{a}{e}

Hyperbola

Equation \frac{x^2}{a^2} - \frac{y^2}{b^2} = 1 \frac{y^2}{a^2} - \frac{x^2}{b^2} = 1
Coordinates of Focus (\pm c, 0) (0, \pm c)
Coordinates of Vertex (\pm a, 0) (0, \pm a)
Relation between a, b and c c^2 = a^2 + b^2 c^2 = a^2 + b^2
Equation of Transverse Axis y = 0 i.e. X Axis x = 0 i.e. Y Axis
Length of Transverse Axis 2a 2a
Equation of Conjugate Axis x = 0 i.e. Y Axis y = 0 i.e. X Axis
Length of Conjugate Axis 2b 2b
Length of Latus Rectum \frac{2b^2}{a} \frac{2b^2}{a}
Equation of Directrix x = \pm \frac{a}{e} y = \pm \frac{a}{e}

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